Machine for crushing and grinding asphalt rock



2- Sheets-Sheet 1.

i (No Model.)

,J. H. TABLER. 1111110111113 FOR GRUSHING AND GRINDING ASPHALT ROGK.

No. 517,311. Patented Mar. 27, 1 94.

WITNESSES.

A TTOHNE YS.

(No Model.) 2 Sheets-Sheet 2.

I I J. H. TABLBR. v MACHINE FOR GRUSHING AND GRINDING ASPHALT ROCK.

Patented Mar. 27, 1894.

IJ NY WITNESSES:

crusher.

NiTED STATES ATENT OFFICE.

JOHN H. TABLER, OF RUSSELLVILLE, KENTUCKY.

MACHINE FOR CRUSHING ANDiGRINDING ASPHALT ROCK.

SPECIFICATION forming part of Letters Patent No. 517,311, dated March2'7, 1894.

Application filed $eptein'ber 22,1893- Serial No. 486,243- (No model.)

To all whom it may concern.-

Be it known that I, JOHN H. TABLER, residing at Russellville, in thecounty of Logan and State of Kentucky, have invented a new and ImprovedMachine for Crushing and Grinding Asphalt Rock, of which the followingis a specification.

My invention relates to means for crushing and grinding asphalt rock, asit leaves the quarry, into a size suitable for shipping, and ready foruse to be mixed in with asphalt, concrete or other material for pavingpurposes, and among other objects, it has for its purpose to grind suchrock in a simple, rapid and economical manner.

The invention consists in the peculiar arrangement and novel combinationof parts hereinafter described and particularly pointed out in theclaims, reference being had to the accompanying drawings, in which-Figure 1 is a side elevation of the complete machine or apparatus. Fig.2 is a longitudi nal section of the heater, crusher, and revolving feedcylinder, taken on the line 2--2 of Fig. 3. Fig. 3 is a front elevationof the Fig. 4 is a transverse section of the heater and feed cylinder onthe line -l-4 Fig. 2 and Fig. 5 is a view of a modification hereinafterreferred to. Fig. 6 is a detail View of the crushing rolls.

In the practical construction of my machine, I employ a revolving feeddrum, mounted over a heating chamber, into which drum the material isfed at one end, and is heated as it passes therethrough before itdischarges into the crushing and grinding rolls. These rolls arearrangedwith different contact faces, are of different diameters and aredifferentially spaced'apart, and journaled to rotate at differentspeeds, whereby the material is successively crushed into smallparticles and caused to uninterruptedly feed through such rollers; mixedsteam and hot water being also mixed with the material as it is beingcrushed whereby to prevent the same from clogging or adhering to therolls.

Referring now to the drawings A indicates a suitably arranged supportingframe, and B a cast iron fire box or fine chamber, the upper end ofwhich has a cylindrical extension formed of a sheet metal jacket, suchjacket and the fire chamber forming, as it were, a

tubular heating drum, at the front end of which is disposed the fire boxproper, while at its rear or discharge end is the off take or stack pipeI) as shown most clearly in Fig.2. Bv reference to such figure it willbe noticed that within the tubular heating drum is held to turn, thefeed cylinder 0, which is mounted on a shaft D, by means of the spiderarms c, which shaft is journaled in bearings o. a on the main frame, itsrear end being promoted as at d and provided with a bevel gear D.

In the practical construction I prefer to form the feed cylinder with asmooth nner face, and incline same downward from ts receiving to itsdischarge end as shown, it being obvious however that the same may bearranged horizontal and provided with spiral or feed ways of anyordinary construction.

E indicates the hopper arranged at the top of the crushing and grindingportion of the machine which receives the heated rock from the feedcylinder 0, which discharges into the crushing and grinding chamberF, ontop of the main rolls G. These rolls it will be noticed have sharpcutting shaped teethg, and are held spaced apart a 'sufficient distance,in practice three inches, to take in between them the largest pieces ofstone, which they crush, and feed in a crushed state to the next set ofrolls G, which have shallow corrugated peripheral faces, and in pract ceare held but one and one-half inches apart and serve to crush thepartially crushed stone 8 5 into smaller portions, and feed same ontothe grinding or pulverizing rolls G, which have smooth faces, whichapproximately contact as shown in Fig. 2 and serve to grind the stone upfine, and discharge same onto an 0 inclined bottom H, from which itpasses into a suitably arranged receptacle. To the more effectivelycrush the stone and prevent c1ogging, the several sets of crushing andgrinding rolls are geared together, and driven in 9 5 different speedsof rotation, the upper or main crushers in the practical constructionbeing adapted to travel one hundred and fifty revolutions per minute,the second set one hundred and seventy-five revolutions and the Icegrinders two hundred revolutions per minute, such differential rotationsof the rolls serving to cause the lower setof rolls to discharge quickerthan they receive, and in consequence theyserve thereby to automaticallyfree themselves from the danger of clogging or accumulating the materialbetween them, such rolls being driven by the main drive pulley I beltedwith a drive belt J, driven by a steam engine as shown, or other power,a counter shaft K geared with the bevel gear 01 on the feed cylindershaft D being also driven from the main drive wheel as shown mostclearly in Fig. 3.

I" indicates a pipe extending from the engine t0 the hopper E whichdischarges mixed steam and hot water into the hopper to mix in with thestone, such operation being preferably continuous so long as the engineis at work. By mixing steam or hot Water to the material the rolls andmaterial will be kept hot, thereby preventing such material from gummingor sticking to the rolls, it being manifest that the said pipe may beprovided with a valve whereby the supply of steam or hot water may beregulated as desired.

From practical experimentingI have found that without warming or heatingthe stone it cannot be successfully crushed, and without heating therolls, and keeping the material hot as it passes therethrough the samewould become gummy and adhere to the rolls, making a continuousoperation of the machine for any length of time impossible.

It will thus be apparent from the foregoing description taken inconnection with the drawings, that by constructing a machine asdescribed, and treating the material by the method stated, I am enabledto effectively and economically crush and grind the stone.

In Fig. 5 I have shown a modified arrangement of the stone feedingdevices, in such construction a carrier chain M held to move over theheater is shown.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. A machine for crushing asphalt rock, comprising a fire box having acylindrical extension, forming a heating chamber, a feed cylinder heldto revolve in such chamber, and crushing rolls at the discharge end ofsuch cylinder, adapted to receive the dry hot rock as it passes from thecylinder all arranged substantially as shown and described.

2. In a machine for crushing asphalt stone, the combination with a firebox or heating chamber, a stone carrier movable in such chamber, areceiving hopper at the end of such carrier adapted to receive the stonein a hot dry condition, crushing rolls disposed under the hopper toreceive such stone, and a mixed steam and hot water supply held todischarge into the dry hot material as it passes through the crushingrolls all arranged substantially as shown and for the purpose described.

3. Animproved means forreducing asphalt rock from its original quarriedstate, in condition for use as a paving material, comprising a heater, arock carrier adapted to move the material longitudinally andtransversely over such heater, means for operating such carrier,crushing rolls formed in successive series to gradually reduce thematerial, a receiving hopper connecting such rolls and the discharge endof the carrier adapted to feed the hot rock direct from the carrier tothe rolls, all arranged substantially as shown and for the purposesdescribed.

at. In a machine for reducing asphalt rock from its quarried state, thecombination with a heatin g furnace and arock carrier movable over suchfurnace and arranged to discharge the rock in a heated condition, of ahopper arranged to receive the heated rock from the carrier, crushingdevices consisting of a series of crushing rolls, and a mixed steam andhot water supply held to discharge into the hopper to mix with the rockand distribute over the crushing faces of the rolls, all arrangedsubstantially as and for the purposes shown and described.

5. Ina stone crushing machine, as described, in combination, a heatingchamber, afeed cylinder held to rotate therein having its shaftprojected and provided with a drive gear, a hopper, crushing rollsmounted under such hopper, said rolls being mounted in yieldingbearings, the drive gears, the engine, the drive belt connection betweensuch engine and the roll drive gears, a counter shaft geared with thecylinder shaft, operated from such roll gears, and the steam pipeconnection between the hopper and engine, all arranged substantially asshown and for the purpose described.

JOHN H. TABLER.

Witnesses:

J. M. MoCuroHEN, T. S. RHEA.

